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Derailleurs
Shimano 600 front derailleur (1980) A derailleur is a variable-ratio bicycle gearing system consisting of a chain, multiple sprockets of different sizes, and a mechanism to move the chain from one sprocket to another. Modern front and rear derailleurs typically consist of a moveable chain-guide that is operated remotely by a Bowden cable attached to a shifter mounted on the down tube, handlebar stem, or handlebar. When a rider operates the lever while pedalling, the change in cable tension moves the chain-guide from side to side, "derailing" the chain onto different sprockets. Etymology ''Dérailleur'' is a French word, derived from the derailment of a train from its tracks. Its first recorded use was 1930. History A modern road bicycle drivetrain with front and rear derailleurs Various derailleur systems were designed and built in the late 19th century. One example is the Protean two-speed derailleur available on the Whippet safety bicycle. The French bicycle tou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Derailleur Bicycle Drivetrain
Shimano 600 front derailleur (1980) A derailleur is a variable-ratio bicycle gearing system consisting of a chain, multiple sprockets of different sizes, and a mechanism to move the chain from one sprocket to another. Modern front and rear derailleurs typically consist of a moveable chain-guide that is operated remotely by a Bowden cable attached to a shifter mounted on the down tube, handlebar stem, or handlebar. When a rider operates the lever while pedalling, the change in cable tension moves the chain-guide from side to side, "derailing" the chain onto different sprockets. Etymology ''Dérailleur'' is a French word, derived from the derailment of a train from its tracks. Its first recorded use was 1930. History A modern road bicycle drivetrain with front and rear derailleurs Various derailleur systems were designed and built in the late 19th century. One example is the Protean two-speed derailleur available on the Whippet safety bicycle. The French bicycle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lucien Juy
Lucien Charles Hippolyte Juy was a French industrialist who made derailleur gears. He is credited with making the first derailleur with a collapsible parallelogram. A hinged frame swung in and out from the frame and fed the chain to one of a number of sprockets attached to the hub. Juy's derailleurs, sold as Simplex derailleurs, were novel in having a jockey wheel to correct the tension of the chain as it moved across differently sized sprockets. History Lucien Juy owned a bicycle shop in Dijon, Côte d'Or, France. It was there that he made the first Simplex derailleur in 1928. The bicycle historian Hilary Stone said: "It used a single pulley to tension the chain and a pair of guide plates to push the chain to each one of two sprockets. The whole arm was spring-loaded in order to tension the chain – this was the first use of the sprung top pivot which was to become an essential part of the modern indexed derailleur as we know it today. The pulley and guide plates were moved side ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lucien Juy
Lucien Charles Hippolyte Juy was a French industrialist who made derailleur gears. He is credited with making the first derailleur with a collapsible parallelogram. A hinged frame swung in and out from the frame and fed the chain to one of a number of sprockets attached to the hub. Juy's derailleurs, sold as Simplex derailleurs, were novel in having a jockey wheel to correct the tension of the chain as it moved across differently sized sprockets. History Lucien Juy owned a bicycle shop in Dijon, Côte d'Or, France. It was there that he made the first Simplex derailleur in 1928. The bicycle historian Hilary Stone said: "It used a single pulley to tension the chain and a pair of guide plates to push the chain to each one of two sprockets. The whole arm was spring-loaded in order to tension the chain – this was the first use of the sprung top pivot which was to become an essential part of the modern indexed derailleur as we know it today. The pulley and guide plates were moved side ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electronic Gear-shifting System
upElectronic front derailleur (Shimano Di2) An electronic gear-shifting system is a method of changing gears on a bicycle, which enables riders to shift with electronic switches instead of using conventional control levers and mechanical cables. The switches are connected by wire or wirelessly to a battery pack and to a small electric motor that drives the derailleur, switching the chain from cog to cog. An electronic system can switch gears faster and, because the system does not use Bowden cables and can calibrate itself, it may require less maintenance. History left, upElectronic shifting control unit and battery pack mounted to the bottom of bottom bracket and left chain stay upElectronic rear derailleur (Campagnolo Record EPS) upHandlebar mounted remotely for the D1x Trail electronic shifting system from Archer Components In 1990 the Japanese bike component manufacturer SunTour introduced the Browning Electronic AccuShift Transmission (''SunTour BEAST'') - a triple c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bicycle Gearing
Bicycle gearing is the aspect of a bicycle drivetrain that determines the relation between the cadence, the rate at which the rider pedals, and the rate at which the drive wheel turns. On some bicycles there is only one gear and, therefore, the gear ratio is fixed, but most modern bicycles have multiple gears and thus multiple gear ratios. A shifting mechanism allows selection of the appropriate gear ratio for efficiency or comfort under the prevailing circumstances: for example, it may be comfortable to use a high gear when cycling downhill, a medium gear when cycling on a flat road, and a low gear when cycling uphill. Different gear ratios and gear ranges are appropriate for different people and styles of cycling. A cyclist's legs produce power optimally within a narrow pedalling speed range, or cadence. Gearing can be optimized to use this narrow range as efficiently as possible. As in other types of transmissions, the gear ratio is closely related to the mechanical ad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oscar Egg
Oscar Egg (2 March 1890 – 9 February 1961) was a Swiss track and road bicycle racer. He captured the world hour record three times before the First World War and won major road races and stages of the Tour de France and Giro d'Italia. He was also a noted developer of racing bicycles and bicycle components including lugs and derailleurs. The hour record Between 1907 and 1914 Oscar Egg and Marcel Berthet improved the hour record six times between them. Egg's 1914 mark of 44.247 km then stood until 1933. Egg set all three of his records at the Vélodrome Buffalo in Paris. The track was a 333m outdoor track surfaced with concrete. The sequence was as follows: *20 Jun 1907, Marcel Berthet, Paris, 41.520 km *22 Aug 1912, Oscar Egg, Paris, 42.122 km *7 Aug 1913, Marcel Berthet, Paris, 42.741 km *21 Aug 1913, Oscar Egg, Paris, 43.525 km *20 Sep 1913, Marcel Berthet, Paris, 43.775 km *18 Aug 1914, Oscar Egg, Paris, 44.247 km Only Chris Board ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SRAM (bicycles)
SRAM LLC is a privately owned bicycle component manufacturer based in Chicago, Illinois, United States, founded in 1987. SRAM is an acronym comprising the names of its founders, Scott, Ray, and Sam, (where Ray is the middle name of the company's first CEO, Stan Day). The company is known for producing cycling components, including some internally developed, such as Grip Shift, EAGLE (1x12), DoubleTap, dedicated 1x11 mountain and their range of AXS drivetrains. The company grew organically and through acquisitions to become a cycling component brand, selling under the brands SRAM, Avid, RockShox, Truvativ, Quarq, Zipp, TIME Sport pedals, Hammerhead cycling computers, and Velocio cycling apparel. Their components are manufactured primarily in-house, in factories located in Portugal, Taiwan, China, and the U.S., and distributed and sold as Original equipment manufacturer (OEM) equipment and aftermarket components in markets globally. History As a start-up company, SRAM introduced t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SRAM Corporation
SRAM LLC is a privately owned bicycle component manufacturer based in Chicago, Illinois, United States, founded in 1987. SRAM is an acronym comprising the names of its founders, Scott, Ray, and Sam, (where Ray is the middle name of the company's first CEO, Stan Day). The company is known for producing cycling components, including some internally developed, such as Grip Shift, EAGLE (1x12), DoubleTap, dedicated 1x11 mountain and their range of AXS drivetrains. The company grew organically and through acquisitions to become a cycling component brand, selling under the brands SRAM, Avid, RockShox, Truvativ, Quarq, Zipp, TIME Sport pedals, Hammerhead cycling computers, and Velocio cycling apparel. Their components are manufactured primarily in-house, in factories located in Portugal, Taiwan, China, and the U.S., and distributed and sold as Original equipment manufacturer (OEM) equipment and aftermarket components in markets globally. History As a start-up company, SRAM introduced t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shimano
, originally and later , is a Japanese multinational manufacturing company for cycling components, fishing tackles and rowing equipment, who also produced golf supplies until 2005 and snowboarding gear until 2008. Named after founder Shozaburo Shimano (, 1894–1958) and headquartered in Sakai, Osaka Prefecture, the company has 32 consolidated and 11 unconsolidated subsidiaries, with the primary manufacturing plants based in Kunshan (China), Malaysia and Singapore. In 2017, Shimano had net sales of US $3.2 billion, 38% in Europe, 35% in Asia, and 11% in North America. Bicycle components represented 80%, fishing tackle 19%, and other products 0.1%. The company is publicly traded, with 93 million shares of common stock outstanding. They are also the official neutral support for most of the UCI World Tour. Cycling Shimano sales constitute an estimated 70–80% of the global bicycle component market by value. Its products include drivetrain, brake, wheel and pedal components ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Racing Bicycle
A racing bicycle, also known as a road bike is a bicycle designed for competitive road cycling, a sport governed by and according to the rules of the Union Cycliste Internationale (UCI). Racing bicycles are designed for maximum performance while remaining legal under the UCI rules. They are designed to minimise aerodynamic drag, rolling resistance, and weight, and balance the desire for stiffness for pedaling effiency with the need for some flexibility for comfort. Racing bicycles sacrifice comfort for speed compared to non-racing bicycles. The drop handlebars are positioned lower than the saddle in order to put the rider in a more aerodynamic posture. The front and back wheels are close together so the bicycle has quick handling, which is preferred by experienced racing cyclists. The derailleur gear ratios are closely spaced so that the rider can pedal at their optimum cadence. However, racing bicycles must retain the ability to maneuver safely within a tightly-packed pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cogset
On a bicycle, the cassette or cluster is the set of multiple sprockets that attaches to the hub on the rear wheel. A cogset works with a rear derailleur to provide multiple gear ratios to the rider. Cassettes come in two varieties, freewheels or cassettes, of which cassettes are a newer development. Although cassettes and freewheels perform the same function and look almost the same when installed, they have important mechanical differences and are not interchangeable. Freewheels A freewheel (also known as a block) consists of either a single sprocket or a set of sprockets mounted on a body which contains an internal ratcheting mechanism and mounts on a threaded hub. Threaded rear hubs were available in different thread patterns depending on the country of manufacture, French and British threads being the most common. British C.E.I. (Cycle Engineers Institute) thread was adopted as the international standard and is now known as B.S.C. (British Standard Cycle). It is a standar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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